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  <title>Check if code point is a base character</title>
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  <div id="layout-content"><div id="intlchar.isbase" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">IntlChar::isbase</h1>
  <p class="verinfo">(PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">IntlChar::isbase</span> &mdash; <span class="dc-title">Check if code point is a base character</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-intlchar.isbase-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="modifier">static</span> <span class="methodname"><strong>IntlChar::isbase</strong></span>(<span class="methodparam"><span class="type"><span class="type">int</span>|<span class="type">string</span></span> <code class="parameter">$codepoint</code></span>): <span class="type"><span class="type">?</span><span class="type">bool</span></span></div>

  <p class="para rdfs-comment">
   Determines whether the specified code point is a base character.  <strong><code>true</code></strong> for general categories &quot;L&quot; (letters),
   &quot;N&quot; (numbers), &quot;Mc&quot; (spacing combining marks), and &quot;Me&quot; (enclosing marks).
  </p>
  <blockquote class="note"><p><strong class="note">注意</strong>: 
   <p class="para">
    This is different from the Unicode definition in chapter 3.5, conformance clause D13, which defines base characters
    to be all characters (not Cn) that do not graphically combine with preceding characters (M) and that are neither
    control (Cc) or format (Cf) characters.
   </p>
  </p></blockquote>
 </div>


 <div class="refsect1 parameters" id="refsect1-intlchar.isbase-parameters">
  <h3 class="title">参数</h3>
  <dl>
   
    <dt>
<code class="parameter">codepoint</code></dt>

    <dd>

     <p class="para">The <span class="type">int</span> codepoint value (e.g. <code class="literal">0x2603</code> for <em class="emphasis">U+2603 SNOWMAN</em>), or the character encoded as a UTF-8 <span class="type">string</span> (e.g. <code class="literal">&quot;\u{2603}&quot;</code>)</p>
    </dd>

   
  </dl>

 </div>


 <div class="refsect1 returnvalues" id="refsect1-intlchar.isbase-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns <strong><code>true</code></strong> if
   <code class="parameter">codepoint</code> is a base character, <strong><code>false</code></strong> if not. Returns <strong><code>null</code></strong> on failure.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-intlchar.isbase-examples">
  <h3 class="title">范例</h3>
  <div class="example" id="example-2517">
   <p><strong>示例 #1 Testing different code points</strong></p>
   <div class="example-contents">
    <div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">isbase</span><span style="color: #007700">(</span><span style="color: #DD0000">"A"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">isbase</span><span style="color: #007700">(</span><span style="color: #DD0000">"1"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">IntlChar</span><span style="color: #007700">::</span><span style="color: #0000BB">isbase</span><span style="color: #007700">(</span><span style="color: #DD0000">"\u{2603}"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
   </div>

   <div class="example-contents"><p>以上例程会输出：</p></div>
   <div class="example-contents screen">
    <div class="cdata"><pre>
bool(true)
bool(true)
bool(false)
</pre></div>
   </div>
  </div>
 </div>


 <div class="refsect1 seealso" id="refsect1-intlchar.isbase-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="intlchar.isalpha.html" class="function" rel="rdfs-seeAlso">IntlChar::isalpha()</a> - Check if code point is a letter character</span></li>
    <li class="member"><span class="function"><a href="intlchar.isdigit.html" class="function" rel="rdfs-seeAlso">IntlChar::isdigit()</a> - Check if code point is a digit character</span></li>
   </ul>
  </p>
 </div>


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